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首页> 外文期刊>Journal of Applied Polymer Science >Oxidative stabilization of PAN/VGCF composite
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Oxidative stabilization of PAN/VGCF composite

机译：PAN / VGCF复合材料的氧化稳定

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摘要

An oxidative stabilization process to prepare carbon films was carried out for a new kind of precursor using the composite of polyacrylonitrile (PAN) and vapor-grown carbon fiber (VGCF) by a process of gelation/crystallization from dilute solutions. It was found that the new precursor has special features in the stabilization process different from those of the homopolymer in regard to thermal and morphological aspects. In the stabilization process under heat treatment at 180-350degreesC in an oxidative atmosphere, it was inferred that, although the introduction of VGCF hinders the initiation and propagation step of the cyclization and dehydrogenation reactions, the precursor helps the oxidation and the additional aromatization and intermolecular crosslinking reactions in the stabilization process, thus promoting the formation of the later carbon product in film's shape with good performance. From characteristic works by wide-angle X-ray diffraction (WAXD), FTIR, Raman, and DSC, the changes of the precursors in structure, morphology, and mechanical property in terms of different heat-treat temperatures and tensions were studied. Through a series of experimental results, the effect of the VGCF's introduction on those changes was discussed. (C) 2003 Wiley Periodicals, Inc. [References: 24]
机译：使用聚丙烯腈（PAN）和气相生长碳纤维（VGCF）的复合材料，通过稀溶液的凝胶化/结晶过程，对一种新型的前驱体进行了氧化稳定化工艺，以制备碳膜。发现在热和形态方面，新的前体在稳定化过程中具有不同于均聚物的特殊特征。可以推断，在氧化气氛中于180-350°C的热处理条件下的稳定化过程中，尽管引入了VGCF阻碍了环化和脱氢反应的起始和传播步骤，但前体有助于氧化以及额外的芳构化和分子间在稳定化过程中发生交联反应，从而以良好的性能促进形成膜状的新碳产品。从广角X射线衍射（WAXD），FTIR，拉曼和DSC的特征性工作出发，研究了不同热处理温度和张力下前体在结构，形态和力学性能方面的变化。通过一系列实验结果，讨论了VGCF的引入对这些更改的影响。 （C）2003 Wiley Periodicals，Inc. [参考：24]

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